Cross-site scripting in Symantec Web Isolation
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
Symantec Web Isolation (WI) 1.11 prior to 1.11.21 is susceptible to a reflected cross-site scripting (XSS) vulnerability. A remote attacker can target end users protected by WI with social engineering attacks using crafted URLs for legitimate web sites. A successful attack allows injecting malicious JavaScript code into the website's rendered copy running inside the end user's web browser. It does not allow injecting code into the real (isolated) copy of the website running on the WI Threat Isolation Engine.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Symantec Web Isolation (Symantec Corporation) Fixed in 1.11.21
Timeline
- 2026-10-02 Threatist record created from CVE-2018-12246
- 2026-10-03 Alias added: GHSA-f249-2px5-3wq5
References
Sources
- CVE-2018-12246 · CVE Program
- CVE-2018-12246 · NVD
- FIRST EPSS
- GHSA-f249-2px5-3wq5 · GitHub Advisory Database · CC BY 4.0
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